Police were called to the Washington Valley Road home at about 8 p.m. Monday and found Litwornia's 61-year-old father outside with deep stab wounds, according to the Somerset County Prosecutor's office. He told officers his son had attacked him.

Police went into the home and found a 61-year-old woman, identified by sources as Litwornia's mother, also suffering multiple stab wounds. She was rushed out of the house but declared dead at the scene, prosecutors said.

His father is in critical condition after undergoing emergency surgery at an area trauma center, authorities say. It wasn't clear if Litwornia has an attorney. He's still hospitalized and will be placed at Somerset County Jail when he's released, prosecutors say.